Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bf8c9c1744fb50cee2a7e3dbe2d8babc97f3c0238c63720ac8d1f5ebe15d9220' 
  AND token = '636EIEHRK3opvAfqkH2IPJc9tnrDyiF6adYFob6sP2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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