Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10e5f9a73bb22315700b203c3187d3df160c298205ca2594441ac4597a8ddc4e' 
  AND token = 'suyEJpkAUzWz2bKOszKRO3ummXgbjWics35h9cDNx2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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