Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47074272256fc1c6821b0d147c70d57685c64ae95323d81d45ad536838d0b56f' 
  AND token = '6ne2XPzuLPVpjxqd9+mHCmBNNvuSqRqq4AHcwB5HD0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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