Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b453a8f21b8ccc9d0060add768a37797215b7e627ce3755838073fd6b1ac8ef4' 
  AND token = '5Rg8UIH2btzTaqFcLak5V6OmxzG/78zCdyhJMqbFiQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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