Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3094b90a067477da156058e0e29994c8ca8c21ee72a656cfe4e5557b530837fe' 
  AND token = 'WY00EwTqxgZL9oAGhvanMed8Pu8ZfsKYLrXLYL+CSeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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