SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '117f4859b62040c815d1ff782b6706990a0e89054d6c118ac5aad6abbe2387b1' 
  AND token = 'GjcI59pxswpRFlytYhA8Zneo6TLrJykK+xqbodBYpLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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