Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4da8fed987c1d24d601e8e26ffb3dd6239a69fac77bfe09d259ec14d8d44b112' 
  AND token = '+9TmHXiPUcLc1nysMLpJVLIi4EwwpDd/o+7NpOyOvJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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