Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45ec65bb07319288cc793b5186f4639c83dbdbde99118cd758338052b72a9486' 
  AND token = 'y7O0vrTUTjIdspzZfCLMxgoxEuLAUyZVr9wtEdDR/8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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