Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5f35de1b78e2a4ee43110972ebf8350af6aab9b606429c978ad7e7c7d152eff' 
  AND token = '9Cn7pHmBLnsVhTB0wT/nntRo5ZvElIC9DH8Oj3GZiBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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