Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1499a3dc3909e356685a410b6fd3131b5e8cc3d7efb3cb2e34236b10c6f2204' 
  AND token = 'dykzL25+V84p9VYZbEJEVb71xN6WDukHz1m0GF63+Y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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