Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0c44d63f4443959faeab8d258398a29a5c80a9424ba9dca9d67facac9bcf915' 
  AND token = 'eTv5IKtPYzfk4878GH3ZY07i7fUOW7f2heXoPtfTSmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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