Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f597046c73c9bdfb20e002436a860b60648c6fd9446cddee012f5873a131f26' 
  AND token = 'e89u5z106bOGYyqIYbubMBBPLbBQBucO6cHKW6EPOD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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