Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caffbbe6902ef6c1b6bfcdd3b4fe0e268ee09b3da1ee6189e3da896fc833824e' 
  AND token = 'H1EJx5OqtngBfC/vH/U70M2QPWSZqH/xAmqph+fFEtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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