Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2ebcd462c027f50614a4ec43077715aa71cb2febd557f8b4619492fd1b024a1' 
  AND token = 'CD8R3v8Umsx28zk6AA0eJ5en5x7+Pc3PRIpC0U0gXVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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