Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f2f0df0da9b8eddbb9e3f007ea1180b367ff80ae18b1df102b298f354e88302' 
  AND token = 'y3JVousapiKiFC8Hjm3+07/IcC4Xt7heDQwlB5k6pY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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