Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7be8a79c3f3286e5823a0af7276aa8236522fa1ad13d701d5f29f7b2b56ef4a6' 
  AND token = 'c9lec9GFPNm0EnmZ60uGgn2xXKAD3TTe9vRI4oCoCHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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