Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c39e1d289f8260bca2d36536a19981d790779c3765b1791ca19252861fbf8e13' 
  AND token = 'YsWwVaQyCGRwb2Hk04CLUooc9XPApeNzibnFA1RH5PE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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