Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19afc7966ccf98fb76a6d499a1b9873da3fa9769a65217f1e9b1fbfd863716c7' 
  AND token = 'nxR5haCpChJLxmnf+kM4Uo8d7yChrw1x/uUCeF8kZlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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