Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dade427f549b5163b5013e2024eb103978115e62ecb488e3efec06624f6391f1' 
  AND token = 'QDj7su8wf2Cgla8qQF+5Lq3H/Ljuki5dD1SvTG4qelw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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