Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24d8367420340a21eb0139a042323204b8e15be9372ddeb48d31e760f7b41b90' 
  AND token = 'pZ70mJELULBEE3aefEtkIwM8T/VlrPgkShpcMDoc7tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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