Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79fadbe8c1486716faacf3d7009ace3c1ce185a32d9ce45feb28261af3a3357a' 
  AND token = 'so7tUV68VT75o84HlUaXw1HBCCAhvpxghgGhOkNIQck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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