Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6455134096d5d9ed7c3521f3a46d0564ffb6a5833fc835257a60c261164ea6c3' 
  AND token = 'oGjc8Bkr35Z40umQRUFy4eJcD90Eiswe/Rd6QG4H3iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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