Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea4eae449717a1ab63773fe14be0d694fb00870e9b5d0d4068d8dfee0cf8b578' 
  AND token = 'eBoHTx0cupG3xaIJL5ZILKdzoUci3I4bMFhIjOT5TSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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