Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b05ae4b2f787ac80e2c0f2ae92749bc87c2540c99204d55742ea845bb2821a2' 
  AND token = 'eY/yFP6S4Oxosujyr1etQ6Ea7euyYR4hUuej96exl78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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