Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '554ad16f48ec1452a6fb52d61109643ee3a892622f83ee72b72e016eeea2e55a' 
  AND token = '5N5s2AsoG70tAtR2a5DVz6GZGaOk5GOA98uo1VbnnMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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