Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a444fe198823bb2be159c2615497c3c4df68b4214c7984181c12a750b737cbbb' 
  AND token = 'kyzQ4/U5C/osnk3RuPlkCfwPlJ3QEKDotuyZZDWYb0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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