Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bdade89061c158ee0d7d877f466b4ba73c6e7a8c375eecc6a1a4c9c7bcb151e' 
  AND token = 'dI2oHFmZKfKp2FGts2omn/qKxQl/yG4olthFsKSEjkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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