Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de618a2018d51948cc91d9b8c74f92b47cdd9e718471d98f524f717841f169a5' 
  AND token = 'gLA+EuCgRhwAzwUplaXus13dujAQd8A+Tv6X18GnCjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00121

JSON explain

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