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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c13626aad224553b8dabc889a01980f5783f605480f79a462de60db8a97bb7b' 
  AND token = 'lUiO7ngDxsDC1uiLg+YfE08iWK9vR0cM3Jxa6EiIVfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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