Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2d2e90d7569ed5a33b3adb0224e455d69a06e589dc56f194aebe10596918d54' 
  AND token = 'WMktj6tm/i7hL7TKvFnVygaSqAJGycPbcy1s0c5OYPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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