Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b49dabda7a723e65992e850c92f9cc666acff1d712ae560e48f230b8cf6b960' 
  AND token = '3A430uh2qFyqitzKnb7noGPH5R7zBmM2uXVxRG3nkRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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