Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8136bc8e7a8f062dd34ae4a4e3c8d1c80de77fac436e38f1f56e526f86cae15' 
  AND token = '41Cgk13I81F/xGqtNUYSNhS0RD+Pu2V99iGeF6eHw58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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