Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58484ad4b54c0f336010eec663f2ee103dabfd2edc7697935ed4d8ff5beadc49' 
  AND token = 'G47gxxom+PGB+JJvqKOCDM8DBd83n1a8rF7P/NN9pDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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