Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '781cb0c933dd0ed62fbb2d10ad610f2a2ac29e2d1f44d81d870278b8c1a17e06' 
  AND token = '7q6BlKMfTG351pT0QE+2dJgx8IKRyCJ6HOHdA4cGNgk=' 
  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"
    }
  }
}