Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd69e21c3b56cefdbcdd63d4989ebb02bb65d2bd85708febf469bfcdb95474a90' 
  AND token = 'ymQpNcVljk6HhrVeBL2VFLSKYPNV/nTcg1NA1PtidRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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