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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '009977249364f63a4aa26e3dea83dfecf128a62f0193f5193ca192b86d5542c3' 
  AND token = '3/2Xe8D9h2lhKei9eT24JYVjyfFvaxFG3w7Ts7k+rnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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