Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '679dd9473dfb15b5b98f996ffa52f6d1c2990283af86eacaa0f7bcd1e519dd76' 
  AND token = 'AKjetm9mKQZm3kwwIHOaDmkAdcNY7HSQFfaL608BY6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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