Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1e262d7ea6da135e36a4fe4e8609174b2161f98dfb981ea2169457e1dc72fd5' 
  AND token = 'v2C7iD7k/wl7n/XDqLYQf3jt0Lnn6gSfOPtLEBZH4V4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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