Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0de0c6812926ec8705a90a8993597c8deceee6501a5e7ff541df8c9311c73c9b' 
  AND token = 'otA296zoF8v4W1id1uIzyf9xd669vVj6ri4D4xXJo6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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