Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19983799ca9782fb3507fca107672f2719f06fb2edd9cf5477ca8a78380f6012' 
  AND token = 'p9w3aL4isnmZ219QOP2JEwrNU+NUYrP6/yzUG6NKkWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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