Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18bcd592b6c2c13ed5be838336d7890d88c8548cc592ac019dbf03c1cc7a2a54' 
  AND token = 'oBaZLzIuIoIvqL9g86T9tW1wxxNBisQI1KTaJqZOAH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}