Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd30a3b3d5ad33c4c155e6e89e5bc2b7f03c4ebb8d10248826a7c68ca9f061e88' 
  AND token = 'Qe6DS6CYRjRzTOHPQ3UB78OANZjSOQyaEjVX6AgtQok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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