Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e625341959d1fd54c3cbbdae2169b7bcb867c48c017bae1086fb9b1fce87d518' 
  AND token = 'ivFdYWH54xpzR0cMiOMec8oCgpU1Wlf/Kw+pQUNyUMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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