SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33bd5490ce98346b52eb5177417c888138f92ed644b78665d25346ef7dcf7c52' 
  AND token = '+OvyXWl0zlyjwQ/LZ/5YLtvFxs7pFJ89V8kC35gZNHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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