Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a42859834f8ab18e2bfa02672f9ed9d8a13566e1afbbd10c40c96e087877f54f' 
  AND token = 'QdeUOdGq5LiuOazVOvO3elr8/N3G6b561bfl7Z2T49o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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