Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b0b6701b6b3a7d3dd5c0883926683eeeab10455f813819085117f1dd84e307e' 
  AND token = 'aRUAQqTo0vYRhmQknIA55KgfQuR4fMlOR121JWelLNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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