Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eb26bfe734268154deb61f149139b260984eca5b57d630f8f6334ef841829e2' 
  AND token = 'A5N4v5Y0PuUz6x85BLOleZScREulsZ6lvZsWjxHn3V0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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