Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b0de01502ca6656f0de0b50cac9e3327f660664524ff8a79888238465fa1bce' 
  AND token = 'JxKpIwO5X4FppmtvI2kcaJMbN426Q0Evyqi5o+AlC2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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