Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ba68b6b2fd201250809800d8bd8493ae18c76c8e9bf61d6ad9a6ca024f991e7' 
  AND token = 'x7kWZxDBo9F9xR/HaK0Q8V/tE+hYCJdQKu2SlNMda48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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