Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3247f65b5cf5635e37abf5b7f0334ad779e0ec14e6e0f58c39fc5ea9c789d7a3' 
  AND token = 'MqY5qB6ehghIzG5GYL2hbsFhTx0fTRycRpFQI0oBiYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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