Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '069d7e8c4b986920be56098a367723ac23c7a3e2b20ebd52bf18d65976969524' 
  AND token = 'MhBIXDSbdASDaojq9V8Ku1IIL525ey7nEqaeDWwVl+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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