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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0daa62acc209cd5757e3936f668d49058e8d49b7cd4abf30e78d1097a68c7901' 
  AND token = 'I/Ww9KQAR1SlaJXFpE4L4jlSE2KaQHF0XJ0Wd73s/AM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}