Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab206dc863587061da4797f6d20c3af7bea0e7aa3277ae7a49ba3fc35077fdeb' 
  AND token = 'hFGO9oWXZtCpt5tPZYjd9vB0uB8GEaoEcU8EOBaKC04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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