Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf8b8a0d4ef66d957e116f351d3dff454ca1e0f2134c708d1ad106f3f70d1759' 
  AND token = 'cy6CmNUL6Dcf/IcKKjknbSBpxH4KgZmCbfDC6OEGN3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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