Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be338e4af8ba18677a4207efa375aaf766598572ebee8ee932f8c25453225c01' 
  AND token = 'PuKtbuHvOSD7NIopVjNGDlTfwm4BCs8wBWgjWPTPdoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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