Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b1d3fb6a87eb9d2b5d1955dfbd86e9e5d59bf38e8066c34a3ffd80225b4f7d1a' 
  AND token = '7tVx3PkkiDNKlQzuP8+TVbJlIUaArrnv+e9EfKMt6qA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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