Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2710c21215f18624d9f244611247dfde14677e654d5a5759b5acafeeb7bac919' 
  AND token = 't6+kwZ8Iuc9sX1obyKiw1/0zMgJmOlNXFtk2k3wis8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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