Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef97a1c265b659fba15ac38adf877300d4bbe412bed837972f1112486d8f46bd' 
  AND token = 'AhWS7JpNcP/0bJh9DAcgwvw9f3hiYjli0RiOisP1qTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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