Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f589d9268ac144495d105ef09fe8319898448c4db07dfbd7f6cea64ba54a478' 
  AND token = 'D25YFbdmKjqvADHO+aNre02GIh8WdNfgzHkCUC7FGtY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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