Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd564195946f111f67abea3daf024a67abd3a53a5f8a8d27109e04dc1ca0d3043' 
  AND token = 'XqwTtSmemfmYf/CPCA1Zdz0dIYjh7JHFMUfBzJRUAqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}