Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0342ebd8a0f0c7beefb0d06e3396fba207cefb9813aee8ca6be4338ca1dcff5e' 
  AND token = '1aU2Q+kArAFwlvKV+4UITRglZ0+tnhWmD/A67REy+s8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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