Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a82c651daab9579eca53db2c5877a73eb847c4f1de7f59b79870bb903dd8daa4' 
  AND token = 'yDMid0fDTN1dffOCHxFIQdDkcFkN+IUTF4r9wzOzetQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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