Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71a4186496433e81b900c4f9181105e4ea6b61c98e31db23d448bc45f97a12ab' 
  AND token = 'NJAXxDkPEhymrdlJTswcgzx4QmnbA1xXh4NO93MoLgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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