Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86ae45a7df0ff7329e4eca29516d6f546e61614c4dee4cea13c1faca2488574a' 
  AND token = 'vRduCLx/XFNWbM9G7eESCmEINV0bERETxCSqD3NUT4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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