Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30113a287c35ea024f9ffdce6c1676e9e60908c2d542eff94220aa6a0917a832' 
  AND token = '1KU0NgDXlR/BcfhVp5xMpdOMMS/9t2+3KwRi651wtc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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