Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c363a03a96b897fbdf302efffcd5dcf3ab15090f000f2390874ccbf73aa9c4af' 
  AND token = 'WgS53Oi8KS0ohpghggZ6PBCWmD+wc3HPmERS3Q3FGX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}