Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf19b1f3bace2f273de524460fe602536ce8b6ba3f7d4bbff4059911df4dbd5d' 
  AND token = 'Iaw+iKY82mB2oXzr/213Yai/RzX1yBYWqZag4ooLTz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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