Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8966a7815dd8f99eba18a1a93fdf4b09dd08b3a7d3ebbc87b8536bcb65ddad53' 
  AND token = 'fN5ozKOZJTFrCf7nzKkfRdJWef+ZMQ/nOvjv5vjHleE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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