Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '084596389e7a037c11f84ba7ca765e072b6cee905bee5d1f971ce7bbf69e0e43' 
  AND token = '/DCbqb33aoRA8rtVocYrW9nKf2d2DGLb1hLIkj+MbTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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