Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '372b5f0d44263834d488f04b1599c528d0109a0c8ac9ddecde52b4a6e2cd841a' 
  AND token = 'ipGJGTtWkef7ZS65c6VhuRx2PT30E8JBaknZewSNHoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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