Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b073861e5a757fb81f9a899c0675b9da8450ddf47edb4a4e61846ce61972d235' 
  AND token = 'fmRLSpcB/uDHRZhNp10eIJPiLHgZGipPvSftCImDH74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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