Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a98c66b7b680489c066331d7aac9c2247975cce3088275b384c3a5ddcb6c683' 
  AND token = 'UDcB9To6fB0LQ8ATJRep5E4YkzkvXwARlGk8xdCZkf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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