Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63562e74f1a71700cce58ab5a71012b15aae0622f6d9f3310f3b511aeae95dbd' 
  AND token = '2nkNVR+ZcdNUvmk+CWAKp7T6/W7lwojeAfe/KxsGTxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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