Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dc213e89798d941506c307d1a87ce51a919b80989fd8f297d01b5847d48d4f7' 
  AND token = 'eYphE70NS/gMrfdoKvR4PICIPyzRwE5k+u3cevASkQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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