Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c2541bbb42df35e9d486299df29e4db48992021a56e6feba8470b4151018ecd' 
  AND token = 'FFJoP7XnPW2QItyRIwFiF+1MZPAO6Y7K7f96AswhjZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}