Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '915c4149cec7a44ae3829bfc04bf535c6e46449077da679674bba68e50957c83' 
  AND token = 'kJJoyWdcCJ6tFXEP35OXkcdKesJvmVHRgU/C8jFAxbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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