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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28cbaca8c271a5553522760b9daefed865658df9f8fc83a73dcfce800c19a9e0' 
  AND token = 'h94g1dl1+T5KKvO7IzGa6QFXR4LNqY8CyKE6yZb7A6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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