SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d6328b7c454e2d064dc195c1b44c2f1ef74b96f069e38c7b02d1e41fe7a2eae' 
  AND token = 'biNuRpIMjzyP3G/izmaPqTlsj25Z4IFvAlwoUgBhyLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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