Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38ad0ec9aba60da0c9000a74fbae0f5a77e643e90fa09260e607bfe057e81112' 
  AND token = 's5vRnYnbefOc4qQtUa44MsLWkIlcwQc9OE1/yCT6Vtk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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