SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65d004e20e22816c9f4152a6288b54cfba5d777a25554b6ad47201065c5cefbf' 
  AND token = 'S/mo+thUXWYef9BeMONoK5VrNwyA9+e+GQ0azJQWBqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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