Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8a3783eb39afa5f0eb64094ecd23815f1694323a1a4c13b233ec974a7aa7237' 
  AND token = 't0NE1D4r5jMwjk48DUY+Bz4DQhysdebctp5LUfYxaIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}