Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6cb60be3f794af2768504d9894a758951af93317cd439d91310f117b171e11f' 
  AND token = 'deD2IinVCxm3V6iaO9ZvlsjzntKJ1E+dvPgLs+/ErE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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