Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab98078202e84e2af1d8368cec91fda03fc5d7773226b1978fc978bf65aa3bb9' 
  AND token = 'Ars89URbDpWTObtR/Bk3N7rvEPaCs/CNDHd82nL2ep0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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