Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b55dd5912300b2250b1af9ea7d722ae5418b3b6f09cbfcf5033a01c0918fecd' 
  AND token = 'JSzPXVtMxmoV9vhwMV6e5eEUVzNh0T7IFJTTl6ExzqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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