Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '448c7a67903363273a9ebf66aef2dac2c35ee555e6b3d9105ce90324c12c6101' 
  AND token = 'yTiNWE2+odtc8rC8esLHIz7j6M7MGL2dTAb+2fny/Lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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