Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c4068c785fc7ce4956472d05f2da69dfec6241f3fb32e94a7c5c1abe951f1ec' 
  AND token = 'ZCi5vQ0te7n2mybN7LYXhHmTpov/d3wXPIXHvZze7Jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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