Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '714c1f5650871fb57ebef442b047b85618c9fc70ebaea57c21a38f764cd09a2d' 
  AND token = 'jMFOPvX5gIGT0tCapkjAzDzoGa3zzy53bj9dQSrgMOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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