Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3de86c20c71d0d8b7a56f6e7e3ac06035f07164bd7344984bbe60e1ad652045' 
  AND token = 'RkLti77Q2GmnUUTGymGd36vtMTu2SL24iaFMW5wLuNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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