Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f59c88c497f58490ddd380b4fe51c321941c701028a77f44a6d44bd0d6dfa5c' 
  AND token = 'VdUma75t57TUUNYbSi81xkkXlRUQ0kkjLSw7oXm0Gkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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