Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4142ae767a12986d3ce229b8e15b2519f9a684f7af7a8347e3ef6e62e373f3c' 
  AND token = 'd14yDpRA4GTtb44vb/6m++FX0jBHUZup4eEI3roUAl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}